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Tasks & technology
Workload of a task (NASA-TLX)
Rate a task you just finished on six scales, from mental demand to frustration, and see its overall workload.
Your answers stay in this browser tab unless you choose to share them anonymously.
About this questionnaire
The NASA Task Load Index was developed by Sandra Hart and Lowell Staveland at NASA Ames Research Center (1988) and is the most widely used measure of perceived workload, from cockpits and operating theatres to software tasks.
Think of one specific task you have just finished, and rate it on each of the six scales. On Performance the left end means you did perfectly, so on every scale further right means more workload.
Scoring: each scale runs from 0 to 100 in steps of 5. This page uses the widely used “raw TLX”: the plain average of the six ratings, without the original pairwise weighting step.
Before you start
For reflection, not diagnosis. This is a self-report questionnaire. It cannot diagnose any condition, and it is not a basis for hiring, admission or any other decision about a person.
Private by default. Everything runs in your browser. Your answers are not saved or sent anywhere unless you choose, before starting, to share them anonymously for site statistics.
Provided as is. A personal project, free and with no warranty. Not connected to any institution I work with.
Credit
Hart, S. G., & Staveland, L. E. (1988). Development of NASA-TLX (Task Load Index): Results of empirical and theoretical research. In P. A. Hancock & N. Meshkati (Eds.), Human Mental Workload (pp. 139–183). North-Holland. Hart, S. G. (2006). NASA-Task Load Index (NASA-TLX); 20 years later. Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 50(9), 904–908. https://doi.org/10.1177/154193120605000909
NASA describes the TLX as “open source”: no permission is needed to use it or to translate it (nasa.gov).